She paired them with a deep teal dress with a Peter Pan collar and a matching fascinator.

"Such a beautiful pair of earrings, 5.33 carats in total, 146 diamonds. And they looked absolutely beautiful on Zara," designer John Calleija said.

"We didn't have exactly what was required for her look in London, but did have them here on the Coast, and shipped them over."

Overall, Zara chose four different sets from Calleija, and due to her dress choice, eventually opted for the tourmaline earrings.

"They're a really rich, beautiful, beautiful deep gem, and they seem to have gotten some good exposure," Mr Calleija said. "While we were watching the wedding, we felt a bit of a connection, and every time we saw Zara on screen we'd talk about the earrings."